Accepted Answer

There's a list in another question here: posted by drgnslayers in Where can i meet the other dragon quest characters?

this info is after the Japanese version. if this order's right, Ashlynn from DQ6 should be next. Here's the order and the day they were released in Japan.DQ4 Alina 2009/07/31DQ8 Angelo 2009/08/21DQ6 Ashlynn (Barbara in the English fan-translated DQ6 Super Famicom version) 2009/09/11DQSword Fleurette 2009/09/18DQ4 Kiryl 2009/10/02DQ5 Nera (Flora in the English fan-translated DQ5 Super Famicom version) 2009/10/23DQ2 Cannock (The Prince of Cannock, Primo in the French version) 2009/11/13DQ8 Jessica 2009/11/20DQ2 Moonbrooke (The Princess of Moonbrooke, Priscille in the French version) 2009/11/27DQ5 Debora (exists only on the DS version) 2009/12/04DQ8 Trode (King of Trodain) 2009/12/25DQ7 Maribel 2010/01/15DQ6 Milly (Muriel in the English fan-translated DQ5 Super Famicom version) 2010/01/28DQ4 Torneko 2010/02/05DQ5 Bianca (that was her name in the English fan-translated DQ5 Super Famicom version) 2010/02/26DQ7 Kiefer 2010/03/19DQ4 Meena 2010/04/09DQ4 Borya 2010/04/30DQ4 Maya 2010/05/21DQ8 Yangus 2010/06/11DQ6 Carver (Hassan in the English fan-translated DQ6 Super Famicom version) 2010/07/02DQ8 Morrie 2010/07/15DQ4 Ragnar 2010/07/16

Remember that the Super Famicom Dragon Quest V and VI versions were never released in America due to the fact that Enix closed his North-American division Enix of America.